I’ve not seen it on racing drones (likely for the reason mentioned by others), but have seen it in mid-range pre-built ones quite a bit. For example, the DJI Ma

I’ve not seen it on racing drones (likely for the reason mentioned by others), but have seen it in mid-range pre-built ones quite a bit. For example, the DJI Mavic has a similar configuration to what you mentioned. I’ve built or bought well over two dozen drones ranging from palm sized to my beast, an octocopter with a 5’ “wing span” that draws hundreds of amps at 25v at max throttle, but never got into racing. I’m much more into the building and photography aspects. I’m tempted to build my own software from scratch next (there’s great open-sourced platforms, but I like the challenge of doing it myself).